Process for weighting textile material



Patented May 17, 1932 UNITED STATES HABOLD W. mum, OF SOUTH MANCHESTER, CONNECTICUT, ABSIGNOB TO Cm BROTHERS, 01' SOUTH IAHCKES'I'EB, CONNECTICUT, A CORPORATION OF comer- P300158 FOB WEIGHTIHG TEXTILE IAT'EBIAL Io Drawing.

This invention relates to the process of weighting textile material, and it is especially useful in connection with weighting silk or goods containing silk although it is not rea stricted to this particular use. Hitherto it has been customary in weighting processes to use as high a concentration of the bath as could be safely used without seriously injuring the material. For exam le, when silk 10 was weighted with tin chlori e the chloride bath was kept at about 29 B6. and it was necessary to use refrigeration to prevent the temperature from exceeding about 55 F., otherwise the results would not be satisfacll tory. This process required about an hour for the soaking of the silk in the bath and a large amount of tin chloride was removed and wasted by the excess liquid that was sub uently washed off of the silk. The

ID tin ch oride could not be easily or inexpensively recovered from the wash water.

By the present invention the time uired for carrying out the process is great y reduced, no high concentration of the wei hting material is required in the bath an no large portion of the weighting material is lost and it is not necessary to take any special precaution for keeping the temperature low, and the fibres are not as severely treated as It was the usual case in the old processes.

In carrying out the invention, a small amount of a hydrolyzable salt, say about 2.5% by weight to give a dilute solution, ofthe weighting or loading metal isdissolved in an 8| aqueous solution that contains a substance that furnishes negative ions common to the metal salt, and the material is treated for a few minutes with the solution. The amount of negative ions common to the hydrolyzable salt should be suflicient to prevent substantial ionization and hydrolysis of the salt of the wei ting metal. The aqueous solution is pre erably substantially saturated with the substance that furnishes the negative ions.

I The invention is also useful with concentrated solutions of the weighting material but in such cases the high loss of weighting material is not obviated.

The invention is applicable to weighting or loading textile materials, especially silks,

Application fled August I1, 1828. Serial Io. $01,187.

with the usual wei hting materials, such as tin chloride, zinc clfioride, iron chloride, and aluminum chloride, although other salts of these and other metals may be used with satisfactory results. When a. chloride of the weighting metal is used in the bath a chloride salt is dissolved in the water to provide an excess of the common chloride ions to inhibit the ionization of the metal salt that is used for weighting the material. Similarly, when an acetate of the weighting metal is used, another salt of acetic acid is dissolved in the water which will provide common acetate ions to inhibit the ionization of the acetate of the metal that is used for loading. The same (principle is applicable to other salts of the loa ing or weighting metal.

It has also been found in working with this invention that time can be saved subsequent to the treatment with the metal for loading the material. Heretofore, it has been customary to wash material with water after treating it with the weighting metal salt, then treat the same with sodium phosphate, wash, and then treat with sodium silicate and wash. It has been found that instead of treating separately with sodium phosphate and sodium silicate, the material can be sub- {ected to a combination bath of approximatev equal parts by volume of about 6 B. sodium phosphate and about 6 B. sodium silicate dissolved in water with satisfactory results, thus saving a considerable amount of time.

The following is given as a specific example of carrying out the invention, but it is to be understood that the invention is not restricted to the materials or proportions given 100 cc. thereof. In this way there is present only about 2.5 parts by weight of the tin chloride in each 100 parts by weight of the tin bath or solution. A smaller or a larger proportion of tin chloride may be used, but the smaller proportions are usually preferable in order to save loss of material.

The silk to be wei hted, either in skeins or cloth, is referably rst moistened with water and t ion passed through the bath so asrto remain in contact with the tin chloride bath for about 5 minutes. It is then removed and Washed with water and is then passed through a bath containing both sodium phosphate and sodium silicate for about 2 to 5 minutes and again washed. The silk may, if desired, be again passed through the tin chloride bath and the combination bath of sodium phosphate and sodium silicate, whereupon it becomes weighted more, and this process may be repeated if desired, thereby producing still more weightin The concentration of the combinatlon .osphate silicate bath should preferably such as to make its specific gravity from 69 to 8 B.

It is not necessary to keep the temperature down in this rocess and therefore refrigeration can be is ensed with, as it has been found that wit the dilute solution of tin there is no danger of injuring the silk even if the temperature reaches about 180 F. The small amount of the dilute solution of tin chloride that is carried away by the material and washed off b the water, represents a very small loss. The time saved in the tin bath is indicated by the'fact that it requires only about 5 minutes, whereas the old process required approximately an hour for the tin treatment. The amount of weighting according to this process with 2 of tin chloride in the bath is approximately the same as the old processes with the very concentrated solutions of tin chloride. Also by this process goods in the cloth can be easily weig ted uniformly and homogeneously without the necessity of any special precautions. More tin chloride and brine can be added to the bath as the supply is being consumed, thus keeping the concentration up to about 2 of tin chloride and the process can be made continuous. After the material leaves the bath. the excess liquor may be removed and returned to the bath. The small amount of remaining liquor carried over to the tin wash by the moist material after the excess liquor has been removed from the material has such a low concentration of tin chloride that the loss of tin is very small. It has been found desirable to keep the tin bath slightly acid which condition results from dissolving the tin tetra-chloride in the sodium chloride solution.

A second example is: 5 gins. of ferric chloride, FcCL, were used for every cc. of saturated sodium chloride solution with very satisfactory results. the treatment being carride, a FeCl were used for every 100 cc. of

A third example is: about two or cent by weight of stannous acetate (C COOLSn gamers was dissolved in a substantially saturated aqueous solution of sodium acetate cinoooua,

and the treatment was carried out as already explained.

A fourth example is: Ten cc. of aluminum chloride (sp. gr. 1.28, or 31.8 B.) were used for every 100 cc. of saturated sodium chloride.

A fifth example is: Five gms. of zinc chloride were used for every 100 cc. of saturated sodium chloride solution.

The proportions of weighting materials used may be varied over considerable ranges and mixtures of various weighting materials may be used.

Instead of using sodium salts to provide the negative ions to inhibit the ionization and hydrol sis of the weighting materials, other solub e salts such as calcium chloride, ammonium chloride, magnesium chloride, ammonium acetate, potassium acetate, etc. may be used. In fact, any soluble salt givin negative ions common to the negative ions 0 the weighting material appear to be suitable for the process.

I claim:

1. The process of weighting textile material which comprises treating it with a dilute water solution of a hydrolyzable metal salt, said solution containing a substance furnishing negative ions common to said metal salt in an amount sufficient to inhibit effectively the hydrolysis of said salt.

2. The proc ssof weighting textile material which omprises treating it with a hydrolyzable metal salt dissolved in water in the presence of an excess of negative ions common to said metal salt obtained from a salt that does not materially contribute to the weighting of a textile material.

3. The process of weighting textile material which comprises treating it with a hydrolyzable metal salt dissolved in water in the presence of a suflicient excess of negative ions common to said metal salt to prevent substantial ionization of said metal salt.

4. The process of weighting textile material which comprises treating it with a hydrolyzable metal salt dissolved in water in the presence of a suflicient excess of negative ions common to said metal salt to prevent substantial hydrolysis of said metal salt.

5. The process of weighting textile material which comprises treating it with a hydrolyzable metal salt in a water solution substantially saturated with a substance furniilihing negative ions common to said metal sa t.

6. The process of weighting textile material which comprises treating it with a hydrolyzable metal salt in a water solution containing a substance furnishing negative ions common to said metal salt, said metal salt being about 2.5% of the weight of the solution.

7. The process of weighting textile material which comprises treatin it with a dilute solution of a hydrolyzab e metal chloride, said solution containing an excess of chlorine ions obtained from a salt that does not materially contribute to the weighting of a textile material.

8. The process of weighting material that contains silk which comprises treating it with tin chloride dissolved in an aqueous solvent containing a substance that furnishes negative ions common to the tin chloride to inhibit ionization of the tin chloride.

9. The rocess of weighting material that contains $11k which comprises treating it with tin chloride dissolved in an aqueous solvent containing a substance that furnishes ne tive ions common to the tin chloride to in ihit hydrolysis of the tin chloride.

10. The process of weighting material that contains silk which comprises treating it with tin chloride dissolved in an aqueous solvent containing chlorine ions in suflicient quantity to revent substantial ionization of the tin c oride.

11. The rocess of weighting material that contains sill: which comprises treating it with tin chloride dissolved in a substantially saturated solution of another chlorine salt.

12. The rocess of weighting material that contains si which comprises treating it with tin chloride dissolved in a substantially saturated solution of sodium chloride.

13. The process of weighting material that contains silk which comprises treating it with tin chloride dissolved in an aqueous solvent containing a substance that furnishes negative ions common to the tin chloride to inhibit ionization of the tin chloride, the tin chloride being about 2.5% of the water by weight HAROLD w. STIEGLER.

GERTIFICA'IE or CORRECTION.

Patent No. 1,858,379.

HAROLD w. s'rmcuaa.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 63, strike out the syllable and words "ride, a FeCI3, was used for every 100cc. of" and insert instead the syllable and words ried out. as explained above; and that the said Lettera Patent should be read with this. correction therein that the same may conform to the record of the case in the Patent Office.

Signed and naked this 5th clay of July, A. D. 1932.

M. J. Moore, Acting Commissioner of Patents.

May 17, 1932.

salt being about 2.5% of the weight of the solution.

7. The process of weighting textile material which comprises treatin it with a dilute solution of a hydrolyzab e metal chloride, said solution containing an excess of chlorine ions obtained from a salt that does not materially contribute to the weighting of a textile material.

8. The process of weighting material that contains silk which comprises treating it with tin chloride dissolved in an aqueous solvent containing a substance that furnishes negative ions common to the tin chloride to inhibit ionization of the tin chloride.

9. The rocess of weighting material that contains $11k which comprises treating it with tin chloride dissolved in an aqueous solvent containing a substance that furnishes ne tive ions common to the tin chloride to in ihit hydrolysis of the tin chloride.

10. The process of weighting material that contains silk which comprises treating it with tin chloride dissolved in an aqueous solvent containing chlorine ions in suflicient quantity to revent substantial ionization of the tin c oride.

11. The rocess of weighting material that contains sill: which comprises treating it with tin chloride dissolved in a substantially saturated solution of another chlorine salt.

12. The rocess of weighting material that contains si which comprises treating it with tin chloride dissolved in a substantially saturated solution of sodium chloride.

13. The process of weighting material that contains silk which comprises treating it with tin chloride dissolved in an aqueous solvent containing a substance that furnishes negative ions common to the tin chloride to inhibit ionization of the tin chloride, the tin chloride being about 2.5% of the water by weight HAROLD w. STIEGLER.

GERTIFICA'IE or CORRECTION.

Patent No. 1,858,379.

HAROLD w. s'rmcuaa.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 63, strike out the syllable and words "ride, a FeCI3, was used for every 100cc. of" and insert instead the syllable and words ried out. as explained above; and that the said Lettera Patent should be read with this. correction therein that the same may conform to the record of the case in the Patent Office.

Signed and naked this 5th clay of July, A. D. 1932.

M. J. Moore, Acting Commissioner of Patents.

May 17, 1932. 

